From dlopez@rwth-aachen.de Fri Oct 20 23:11:27 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!dlopez
From: dlopez@rwth-aachen.de (Dmitri López)
Newsgroups: comp.sys.m68k
Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Oct20.231127.8275@rwth-aachen.de>
Date: Fri, 20 Oct 1995 23:11:27 GMT
Organization: RWTH Aachen Informatik
NNTP-Posting-Host: rwth-aachen.de
X-Newsreader: Netscape 1.1N
Lines: 10

Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.
Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.

Anyone running this on a Quadra 840AV with the 68040?

-- 
Dmitri López -- RWTH Aachen Informatik
"Extraordinary claims require extraordinary spectra."

From isanchez@earthlink.net Sun Oct 22 06:38:27 1995
Path: ashpoly!cascade!bigsur!earthlink!isanchez
From: isanchez@earthlink.net (Ines Sánchez)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Oct22.063827.3209@earthlink.net>
Date: Sun, 22 Oct 1995 06:38:27 GMT
References: <1995Oct20.231127.8275@rwth-aachen.de>
Organization: EarthLink Network
NNTP-Posting-Host: earthlink.net
X-Newsreader: TIN [version 1.2 PL2]
Lines: 9

In article <1995Oct20.231127.8275@rwth-aachen.de>, dlopez@rwth-aachen.de (Dmitri López) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.

-- 
Ines Sánchez | isanchez@earthlink.net
PGP Key fingerprint: 1806 00C7 A0B8 EC35
"Keep the channels open."

From skang@hanse.de Mon Oct 23 15:55:27 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!skang
From: skang@hanse.de (Sun-mi Kang)
Newsgroups: comp.sys.m68k
Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Oct23.155527.8929@hanse.de>
Date: Mon, 23 Oct 1995 15:55:27 GMT
References: <1995Oct20.231127.8275@rwth-aachen.de> <1995Oct22.063827.3209@earthlink.net>
Organization: Hanse-Netzwerk Hamburg
NNTP-Posting-Host: hanse.de
X-Newsreader: NewsWatcher 2.0b24
Lines: 9

In article <1995Oct22.063827.3209@earthlink.net>, isanchez@earthlink.net (Ines Sánchez) writes:
> Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.

The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

-- 
Sun-mi Kang
Opinions expressed are solely my own and not those of Hanse-Netzwerk Hamburg.
------------------------------------------------------------